Metallurgy and Rolling Mill Operation Training
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Metallurgy and Rolling Mill Operation Training Course
Introduction:
Course Objectives:
At the end of this training course, you will learn to:
· Better understand the rolling process as an integration of mechanical, metallurgical and control engineering systems
· Use models to determine major rolling process parameters
· Understand roll pass design fundamentals and Use roll pass program to perform design and development
· Use advanced roll pass programs to design high-quality roll pass schedules and to improve existing ones
· Understand flow stress and mean flow stress, and perform the basic calculation on flow stress and mean flow stress
· Manually calculate rolling force, torque, and power, etc., and use software to calculate the force, torque, and power, etc. for various groove sequences in various rolling conditions
· Know general methods for rolling process modeling and understand strengths and limitations for each method
· Understand that steel rolling is a dynamic metallurgical process, with both softening and hardening mechanisms, and rolled steel properties are affected by many process parameters
· Have knowledge of numerical models (FEM, FDM) and use programs to perform some numerical simulations
· Know the temperature profile along the rolling production line and over the stock cross-section
· Simulate microstructure evolution during rolling by applying for the internet-based simulation program
· Understand the significance, function and development progress of the Level 2 system; know that quality of the control system is one of the key indicators for the equipment technology level
· Know Level 2 Model functions, architecture and future development
Who Should Attend?
This course is designed for rolling mill design, development and operation engineers who have basic experiences on steel rolling and rolling mills, and want to enhance knowledge and skills on high-quality mill design, development or operation.
Course Outlines:
Fundamental Principles of Metal Rolling
- Range of Billet and Rolled Product Sizes
- Steel Grades and Steel Qualities
- Classification of Rolling Mills for Producing Rebars
- Main Line of a Rebar Rolling Mill
Heating of Metal before Rolling
- The function of Metal Reheating before Rolling
- Bases of Selection of Reheating Temperature
- Effect of Reheating on Billet Properties
- Billet Temperature Control
- Design and Performance of Reheating Furnace
Fundamentals of Roll Pass Design
- Types of Rolling Passes for Producing Rebars
- Components of Rolling Passes
- Rolling Gap Setting
- Stand Drafting and Coefficient of Deformation in Rolling Stands
Breakdown Sequences
- Box Pass Sequence - Design and Calculation
- Oval - Square Sequence
- Design of Square and Oval Passes
- Distribution of Elongation among Passes
- Characteristics and order of Calculation for Producing Rebars
- 4Oval - Round Sequence
- Pass Cooling and Bar Shape
Factors Affecting Precise Rolling of Rebars
- The rigidity of Working Rolling Stand Rolling Temperature
- The temperature of Working Rolls
- Wear of Rolls and Other Stand Components
- Guides
- Looping and Intere-stand Tension
Calculation of Rolling Parameters
- Calculation of Rolling Load
- Determination of Area under Compression
- Resistance to Deformation in Hot Rolling of Rebars
- Calculation of Rolling Torque and Power Requirements
- Defects of Finished Rebars and How to Prevent Them
Complete Example of Roll Pass Design Calculations for Rebars
- Procedure of Calculations
- Determination of the Number of Passes
- Distribution of Reduction and Elongation among Passes
- Designing the Dimensions of Different Passes
- Check for Areas and Biting Condition
The technology of Rolling Round Rebars
Finishing Operations on Rolled Rebars